find the value of x, 5 ^x+5^x-1=750
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5^x+5^x-1=750
if x = 4
5^4+5^4-1=625+125=750
x = 4 satisfies the condition.
if x = 4
5^4+5^4-1=625+125=750
x = 4 satisfies the condition.
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